Page 67 - The Glory in the Heavens

this temperature is, just think that when you put some

water on the hot-plate, it starts boiling at 100°C

(212°F).

Now, let's think of the opposite. What if Earth

were farther from the sun? In this case, our Earth

would receive less heat. You can imagine that if this

were the case, a great part of Earth would freeze and

turn to ice. Earth's surface would resemble the dry, icy

surface of Mars, which is the planet a little bit farther

from the sun than the earth. We can draw a conclu-

sion from these cases: Our Earth is located just at the

right place! How do you think this has happened? 65